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Evaluation of the effect of ultrasonic and hand subgingival scaling [WTBZ〗

Zhang Xiong,Fan Weihua,Zheng Xiongqun. Guang Dong Provincial Stomatological Hospital,510260  
Thirty eight teeth extracted from the patients with sever periodontitis were randomly instrumented by hand and ultrasonic device.The amount of residuel plaques and calculuses were assessed under the stereomicroscope and graphic precessing system.The findings showed that there was no difference between hand and ultrasonic subgingival scaling for the removal of subgingival plaque and calculus in shallow and deep pockets.The cementum had been partly or totally removed in ultrasonic group,whereas the scarred marks had been observed in hand scaling group.The results suggested that two methods could not remove the plaques and calculuses completely in deep pocket regions.
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【Secondary References】
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1 WANG Bin-ping, et al (Haikou Municipal Hospital, Haikou 570208 China);Application Of Fourhanded Technique In Subgingival Scaling[J];Hainan Medical Journal;2007-06
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